光催化
材料科学
催化作用
石墨氮化碳
氮气
介孔材料
化学工程
化学
制氢
氢
光化学
有机化学
工程类
作者
Ruizhe Yang,Jinyuan Liu,Bin Wang,Rong Wang,Yanhua Song,Yingjie Hua,Chongtai Wang,Yuanbin She,Junjie Yuan,Hui Xu,Yan Zhao
标识
DOI:10.1016/j.jallcom.2021.162290
摘要
The photocatalytic hydrogen evolution reaction is a promising and powerful approach to replace traditional fossil fuels. Herein, we have fabricated Fe, Co dual single atoms dispersed on nitrogen-doped graphene ((Fex, Coy)-NG) by freeze-drying method, which can as a highly efficient co-catalyst. The (Fex, Coy)-NG loaded mesoporous graphitic carbon nitride (mpg-C3N4) exhibits an excellently high performance for photocatalytic hydrogen evolution. The high activity can belong to two ways: (i) the ultrathin mpg-C3N4 not only increases the absorption and active sites but also shortens the charge migration distance; (ii) The nitrogen functional groups from NG can provide abundant coordination sites to evenly bind Fe and Co atoms. The photocatalytic hydrogen evolution performances (Fex, Coy)-NG co-catalyst with different content ratios of Fe atoms and Co atoms were also investigated. The optimized hydrogen production rate (1958 μmol g−1) of 5 wt% (Fe0.2, Co0.8)-NG/mpg-C3N4 is obviously higher compared to the monometallic counterparts (5 wt% Fe-NG/mpg-C3N4 or 5 wt% Co-NG/mpg-C3N4). The higher photoactivities are due to the synergistic effect between Fe and Co.
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